A Novel Circularly polarized dielectric resonator antenna with Branch-Line Coupler and Log-Periodic Balun | ||
| Journal of Communication Engineering | ||
| مقاله 2، دوره 7، شماره 1 - شماره پیاپی 14، شهریور 2018، صفحه 11-22 اصل مقاله (524.41 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22070/jce.2018.2431.1048 | ||
| نویسندگان | ||
| zahra rahimian* ؛ saeid Nikmehr؛ ali pourziad | ||
| Department of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran | ||
| چکیده | ||
| A new shaped circularly polarized dielectric resonator antenna (CP DRA) is studied with branch-line coupler and log-periodic balun for the GPS application. Since the coupler and balun are located under the DRA, it does not increase the footprint of the antenna, as a result the system is very compact. Two configurations are considered in this paper. In the first configuration, an external 50Ω load is used for the matching port of the branch-line coupler. For the second one, a three-resonator log-periodic balun is used instead of branch-line coupler, thus, no lumped elements are required in this configuration. Moreover, two modes HEM11δ of the cylindrical DRA are utilized to design the wide band circular polarization. The reflection coefficient, axial ratio, antenna gain, and radiation pattern are studied for each configuration. These first and the second configurations offer an impedance bandwidth (S11 | ||
| کلیدواژهها | ||
| circular polarization؛ dielectric resonator antenna؛ coupler؛ balun | ||
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آمار تعداد مشاهده مقاله: 598 تعداد دریافت فایل اصل مقاله: 690 |
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